71920 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71920 CDGA/P4A Bearing Product Overview & Core Advantages
The 71920 CDGA/P4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional rotational accuracy. Operating under the stringent P4A tolerance class, this bearing is designed to handle primarily axial loads in one direction and combined loads with high reliability. Its extra light preload (Class A) minimizes deflection under operational stresses, making it ideal for high-speed spindles and precision machinery where rigidity and minimal runout are critical. The universal matching (SU) capability allows for flexible mounting arrangements in duplex sets to accommodate complex load requirements.
71920 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| CDGA | 15° contact angle, Extra light preload (Class A), Universal Matchable | Optimized for high-speed operation with minimal friction and flexible mounting configurations |
| P4A | ABEC 7 / ISO P4A tolerance class | Ultra-precision dimensional and running accuracy for demanding applications |
71920 CDGA/P4A Bearing Structural Features & Performance Benefits
- Precision Engineering: Manufactured to P4A tolerance class with bore and OD tolerances of -0.004mm to 0, ensuring exceptional dimensional stability and running accuracy.
- High-Speed Capability: Features a phenolic resin cage that reduces centrifugal forces and friction, enabling stable operation at limiting speeds up to 16,000 rpm.
- Optimized Load Capacity: With a 15° contact angle and 26 chrome steel balls of 12.7mm diameter, the bearing delivers excellent axial load capacity (13,612 lbf dynamic / 14,738 lbf static) while handling combined loads efficiently.
- Thermal Stability: The phenolic cage material maintains dimensional stability across the operating temperature range of -30°C to 110°C.
- Preload Configuration: Extra light preload (Class A) minimizes heat generation and torque variation, crucial for precision applications requiring minimal deflection.
71920 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring ultra-precise rotation
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Machining Centers: Applications demanding both high rotational speeds and accuracy
- Aerospace Components: Guidance systems, flight control mechanisms, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
